Gold Point Mine (Gray Eagle), China Flat, Downieville Mining District, Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Gold Point Mine (Gray Eagle) | Mine |
| China Flat | Flat |
| Downieville Mining District | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 34' 26'' North , 120° 44' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 7.6km |
| Sierra City | 221 (2011) | 9.1km |
| Plumas Eureka (historical) | 339 (2011) | 20.7km |
| Whitehawk | 113 (2011) | 23.0km |
| Valley Ranch | 109 (2011) | 23.5km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 48km |
A former lode Au-Ag-Cu-Pb-Zn occurrence/mine located in the SW¼NE¼ sec. 28, T20N, R11E, MDM, 1.2 km (0.8 mile) NNE of China Flat (coordinates of record), and about 8.3 km ENE of Downieville, along the W canyon wall of Gold Point Ravine, N of the North Yuba River (5¾ miles W of Sierra City), on National Forest land. MRDS database stated accuracy for this location is 100 meters. Intermittently active.
NOTE: USGS MRDS database file #10140904 presents discrepant data relative to the other 2 MRDS files and places this mine in sec. 4, T19N, R10E, MDM, with coordinates of -120.86463, 39.54428. Those coordinates place it along the S canyon wall of the North Yuba River, E of Goodyears Bar (also in the Downieville area). There is an adit symbol on the topo map at this location. This file also states that the accuracy is 5,000 meters. It also states that the owner/operator is Kenrell Resources, California (1980).
The coordinates provided by the other 2 MRDS files places this mine along Gold Point Ravine at a named mine symbol for the Gold Point Mine, thus, the coordinates presented in file #10140904 are probably in error.
Mineralization is a vein deposit with ore shoots hosted in granite and porphyry. 20% of the Au is free. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of a 1,125 foot adit with 700 feet on the vein.
Production data are found in: McCulloch, W.C., Oesterling, W.A., Spurck, W.H., & Tischler, M.S. (1964).
Analytical data results: Cncentrates of about 2.7 per bulk (??)(percent of bulk ?) gave 7.12% Pb, 1.34% Zn and 0.54% Cu plus Au:Ag of 4:3.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Native Silver Formula: Ag |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| ⓘ | Native Silver | 1.AA.05 | Ag |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Ag | Silver | |
| Ag | ⓘ Native Silver | Ag |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10086584 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060910449 & 0060910403
